Hello Michael
Sorry, I missed your reply (I don't think I've got my notification settings quite right).
Yes, I think it must by the one you mentioned. It's a lovely uke but needs a bit of work (nothing too serious: loose braces, slight seam separation and general set-up needed) and also has some not-so-good replacement tuners.
It's not the grail for me (that would be a style 2 with the later unique headstock design and ideally still with the celluloid soundhole insert), so I'm still looking. But I will get this fixed up and keep it/play it until the grail can be found. If you know any good restorers I would welcome recommendations.
Thanks!